Germany's great U-boat fleet had been defeated, but not demolished, in 1942 and 1943. Last week President Roosevelt and Prime Minister Churchill joined in a warning to the United Nations that Adolf Hitler's raiders had again become more active. As Germany had long since lost most of her Atlantic bases, no one thought that the U-boats could repeat their earlier successes (22,000,000 gross tons of merchant shipping sunk in four and a half years). But some ships would be sunk, and Allied seamen would die because the German submarines would not give up.
The joint statement said "reports that U-boat construction has...